328 Agilent InfiniiVision 3000 X-Series Oscilloscopes User's Guide
21 Reference
Waveform Data
Header
A waveform may have more than one data set. Each waveform data set
will have a waveform data header. The waveform data header consists of
information about the waveform data set. This header is stored
immediately before the data set.
X Display Origin A 64-bit double that is the X-axis value at the left edge of the display. For time
domain waveforms, it is the time at the start of the display. This value is
treated as a double precision 64-bit floating point number. If the value is zero
then no data has been acquired.
X Increment A 64-bit double that is the duration between data points on the X axis. For
time domain waveforms, this is the time between points. If the value is zero
then no data has been acquired.
X Origin A 64-bit double that is the X-axis value of the first data point in the data
record. For time domain waveforms, it is the time of the first point. This value
is treated as a double precision 64-bit floating point number. If the value is
zero then no data has been acquired.
X Units A 32-bit integer that identifies the unit of measure for X values in the acquired
data:
• 0 = Unknown.
• 1 = Volts.
• 2 = Seconds.
• 3 = Constant.
• 4 = Amps.
• 5 = dB.
• 6 = Hz.
Y Units A 32-bit integer that identifies the unit of measure for Y values in the acquired
data. The possible values are listed above under X Units.
Date A 16-byte character array, left blank in InfiniiVision oscilloscopes.
Time A 16-byte character array, left blank in the InfiniiVision oscilloscopes.
Frame A 24 byte character array that is the model number and serial number of the
oscilloscope in the format of: MODEL#:SERIAL#.
Waveform Label A 16 byte character array that contains the label assigned to the waveform.
Time Tags A 64-bit double, only used when saving multiple segments (requires
segmented memory option). This is the time (in seconds) since the first
trigger.
Segment Index A 32-bit unsigned integer. This is the segment number. Only used when saving
multiple segments.
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